Flow condition study and optimization of energy dissipating fixed cone valve
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Abstract:
Energy dissipating fixed cone valve is used under medium or high water head, and the design of its internal structure directly affects its flow control efficiency. To study the changes of the valve’s internal flow field and flow rate when the closed switch is opened to varied degrees, the writer conducted model tests and CFD numerical simulation computation, and found that when the switch was turned down from 100% open to 85% open, the flow rate increased and pressure around the inlet dropped. The writer also conducted visualization research on the valve’s internal flow field through CFD numerical simulation, and the results showed the following problems inside the valve when the switch was fully open: excessively high speed and high pressure in partial areas, extensive low-flow stagnation areas, excess impact of eddy area on the high-speed flow area. Finally, the writer optimized the valve’s structure and its internal flow field.
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